I'm doing my own backyard rebuild, on my first rotary. I'm in the process of porting my end plates and mid iron. Mild streetport from pineapple racing.

I know how spreading the intake opening in different directions affects the timing and power band and such...



What i want to know is how much room for error do you have and the inside edge of the port (closest to the e-shaft) without leaking oil? .... Cuz i nicked that edge and had to sand it out a little but not much. Probably a little less than 1 mm towards the inside of the housing.



Any one have any pictures of port jobs that caused an oil leak?

 

The wear pattern on the iron shows you the limit of the outer oil scraper travel. A bit of an intrusion now and then is of no importance. Some builders have been known to violate the whole width of the outer scraper path to get a bigger port. There is noticable smoke standing still, but it is not detectible at speed. It would be awfull on the street.



Nothing to worry about.



Lynn E. Hanover